Pouched food, or a benign cyst probably. As for pouched food, an etiquette question:
Are we supposed to notice when they pouch food in front of us? Or are we supposed to forget about the tasty morsel and say "Oh my goodness, we is a hungwy hamster! Where did it go!?!
Problem is it's too much fun really to confront them with "I SAW THAT!!!" you have a big PISTACHIO NUT riiiiight HERE!!!!!! and they look all innocent and try to change the subject.....
I start feeling guilty though and put them back in the cage to hide their 'secret stash' and then they come out and off we go again......